Millstones



(a. P. DANCE;

Hanging Millstones.

No. 28,534. Patented May 29, 1860.

IwverzZ UNITED STATES PATET FFICE.

G. P. DANCE, OF COLUMBIA, TEXAS, ASSIGNOR TO HIMSELF AND J. H. AND D. E.DANCE, OF SAME PLACE.

HANGING MILLSTONES.

Specification of Letters Patent No. 28,534, dated May 29, 1860.

T 0 all whom 'it may concern:

Be it known that I, G. P. DANCE, of Columbia, in the county of Brazoriaand State of Texas, have invented a new and useful Improvement inHanging Millstones, and I do hereby declare that the following is afull, clear and exact description of the same, reference being had tothe annexed drawings, making a part of this specification, in whichFigure 1 is a vertical section of a lower rotating millstone or runner,arranged according to my invention. Fig. 2 is an inverted plan of thesame.

Similar letters of reference indicate corresponding parts in the twofigures.

The object of this invention is to hang by a very simple means therunner of a pair of millstones in such a manner that it may, as itrotates adjust itself to the position of the stationary stone, and theparallelism of the faces of the two stones be preserved whether thestationary one be perfectly horizontal or not.

The invention consists in-the employment or use of a driver providedwith a taper opening, in connection with a rocking key fitted in thespindle, the driver being fitted in the runner and resting on the key,substantially as hereinafter described.

To enable those skilled in the art to fully understand and construct myinvention I will proceed to describe it.

A represents the runner, and the lower stone of a pair of Inillstones.

B is the spindle provided with a square section 0, having a metal key 0,passing transversely through it; said key being fitted in a mortisewhich has convex upper and lower surfaces as indicated by the dottedlines in Fig. 1. The key 0, projects a suitable distance from each sideof the spindle, and it has a pin 6, passing through it near each end toretain it in proper place.

D isa metal driver which is secured centrally in the under side of therunner.

This driver may be formed of a hollow square 0, provided with aprojecting bar 03, at each end, as shown clearly in Fig. 2, and theinner sides of the square 0, are beveled or inclined so that the lowerpart of the interior of the square will be smaller than the upper part.The runner A, also has a hole 6, made through its center, to allow thespindle to pass through.

The square part a, of the spindle is fitted in the square 0, of thedriver, the latter resting on the ends of the key C. In consequence ofthe mortise, in which the key is fitted, having convex upper and lowersurfaces the key is allowed to rock therein, and as the interior of thesquare 0, of the driver is larger at the top than at its bottom; therunner is also allowed to rock on the key, the lower edge of the square0, of the driver fitting snugly or quite near to the square section a,of the spindle. The hole 6, in the runner is sufiiciently large to admitof the rocking or play of the stone. By this arrangement the runner A,is connected to the spindle B, by What may be termed a universal-jointattachment, and the face of the runner, as the latter rotates, willconsequently be allowed to conform to the surface of the stationarystone, if out of a horizontal plane or position. The invention it willbe seen is extremely simple and efiicient, involving but little expensein its construction and application.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is

The driver D, provided with a taper square opening 0, at its centerfitted in the runner A, and resting on a rocking key C, in the spindlethe latter passing through the taper opening of the driver,substantially as and for the purpose set forth.

G. P. DANCE.

WVitnesses A. R. PARK, IV. C. BOYKIN.

